Replace Python plugins with native C++ .so, remove bundled Python (~95MB)

- Add native plugins: form43_checker, script_extender_checker, preview_dds,
  basic_games (75 game defs via IPluginProxy pattern with Steam/GOG detection)
- Remove portable Python from Dockerfile and build-inner.sh
- Add Python settings tab with venv support (system python3 + PyQt6)
- Skip loading plugin_python.so when Python disabled (default: off)
- Update pythonrunner.cpp to use venv at ~/.local/share/fluorine/python-venv/
- Preserve real file permissions in FUSE VFS (fixes native executable +x bits)
- Add FUSE_SET_ATTR_MODE handler so chmod works through VFS
- Fix desktop shortcut Exec= to use fluorine-manager launcher, not bare binary

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/libs/preview_dds_native/src/ddsfile.h b/libs/preview_dds_native/src/ddsfile.h
new file mode 100644
index 0000000..4242c61
--- /dev/null
+++ b/libs/preview_dds_native/src/ddsfile.h
@@ -0,0 +1,47 @@
+#ifndef DDSFILE_H
+#define DDSFILE_H
+
+#include "ddsformat.h"
+
+#include <QByteArray>
+#include <QString>
+#include <QVector>
+
+struct DDSMipLevel {
+  uint32_t width;
+  uint32_t height;
+  QByteArray data;
+};
+
+struct DDSFace {
+  QVector<DDSMipLevel> mips;
+};
+
+class DDSFile
+{
+public:
+  bool loadFromFile(const QString& path);
+  bool loadFromData(const QByteArray& data);
+
+  uint32_t width() const { return m_width; }
+  uint32_t height() const { return m_height; }
+  bool isCubemap() const { return m_cubemap; }
+  int faceCount() const { return m_faces.size(); }
+  int mipCount() const { return m_faces.isEmpty() ? 0 : m_faces[0].mips.size(); }
+  const DDSFace& face(int i) const { return m_faces[i]; }
+  const GLFormatInfo& glFormat() const { return m_glFormat; }
+  QString description() const { return m_description; }
+
+private:
+  bool parse(const QByteArray& data);
+
+  uint32_t m_width    = 0;
+  uint32_t m_height   = 0;
+  bool m_cubemap      = false;
+  GLFormatInfo m_glFormat;
+  DXGIFormat m_dxgiFormat = DXGIFormat::UNKNOWN;
+  QString m_description;
+  QVector<DDSFace> m_faces;
+};
+
+#endif  // DDSFILE_H